/// <summary>
/// overrides the <see cref="PlaneSurface.Normal(double, double)"/> method.
/// </summary>
/// <param name="u">first parameter.</param>
/// <param name="v">second parameter.</param>
/// <returns>the normal vector.</returns>
public override xyz Normal(double u, double v)
{
xy value = new xy(u, v);
double dir = 1;
if (!SameSense)
{
dir = -1;
}
u = value.x;
v = value.y;
if (!Smooth)
{
return(base.Normal(u, v));
}
if (value.dist(A11) < 0.001)
{
return(N11.normalized() * dir);
}
if (value.dist(A01) < 0.001)
{
return(N01.normalized() * dir);
}
if (value.dist(A10) < 0.001)
{
return(N10.normalized() * dir);
}
if (value.dist(A00) < 0.001)
{
return(N00.normalized() * dir);
}
if (A10.dist(A01) < 0.00001)
{
xyz B = BaryCentric(A00, A10, A11, value);
return(((N00)*B.x + (N10)*B.y + (N11)*B.z) * dir);
}
if (((A10 - value) & (A01 - value)) == 0)
{
}
if (((A00 - value) & (A01 - value)) > 0)
{
xyz B = BaryCentric(A11, A00, A01, value);
return(((N11)*B.x + (N00)*B.y + (N01)*B.z) * dir);
}
else
{
xyz B = BaryCentric(A00, A11, A10, value);
return(((N00)*B.x + (N11)*B.y + (N10)*B.z) * dir);
}
}
/// <summary>
/// overrides the <see cref="Surface.OnDraw(OpenGlDevice)"/> method.
/// </summary>
/// <param name="Device">the <see cref="OpenGlDevice"/> in which will be painted.</param>
protected override void OnDraw(OpenGlDevice Device)
{
if (!plane)
{
base.OnDraw(Device); return;
}
object Handle = null;
if ((Device.RenderKind == RenderKind.SnapBuffer) || (Entity.Compiling))
{
SurfaceSnappItem S = new SurfaceSnappItem();
Handle = Device.Selector.RegisterSnapItem(S);
S.Surface = this;
}
IndexType[] Indices = null;
xyzf[] Points = null;
xyzf[] Normals = null;
xyf[] Texture = null;
// if ((BoundedCurves != null) && (BoundedCurves.Count > 0))
{
Indices = new IndexType[] { 0, 1, 2, 0, 2, 3 };
Points = new xyzf[] { A, B, C, D };
Normals = new xyzf[] { N00.toXYZF(), N00.toXYZF(), N00.toXYZF(), N00.toXYZF() };
Texture = new xyf[] { new xyf(0, 0), new xyf(0, 0), new xyf(0, 0), new xyf(0, 0) };
}
//else
// GetTrianglesFull(ref Indices, ref Points, ref Normals, ref Texture);
if (Device.PolygonMode == PolygonMode.Fill)
{
Primitives3d.drawTriangles(Device, Indices, Points, Normals, Texture, null);
}
else
{
Primitives3d.drawFouranglesLined(Device, Indices, Points, Normals, Texture);
}
Entity.CheckCompiling();
if ((Device.RenderKind == RenderKind.SnapBuffer) || (Entity.Compiling))
{
Device.Selector.UnRegisterSnapItem(Handle);
}
}
